EP0415037B1 - Brûleur à air soufflé pour chaudière de chauffage avec recyclage des fumées - Google Patents
Brûleur à air soufflé pour chaudière de chauffage avec recyclage des fumées Download PDFInfo
- Publication number
- EP0415037B1 EP0415037B1 EP90113114A EP90113114A EP0415037B1 EP 0415037 B1 EP0415037 B1 EP 0415037B1 EP 90113114 A EP90113114 A EP 90113114A EP 90113114 A EP90113114 A EP 90113114A EP 0415037 B1 EP0415037 B1 EP 0415037B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust gas
- chamber
- opening
- housing
- rotor wheel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract 10
- 239000002912 waste gas Substances 0.000 title abstract 7
- 238000005192 partition Methods 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract 4
- 238000002485 combustion reaction Methods 0.000 claims description 26
- 239000002775 capsule Substances 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims 1
- 238000013022 venting Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 54
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 241001156002 Anthonomus pomorum Species 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/001—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space spraying nozzle combined with forced draft fan in one unit
Definitions
- the invention relates to a forced draft burner for boilers with exhaust gas recirculation according to the preamble of patent claim 1.
- Such a forced draft burner is known, for example, from DE-A-23 65 186.
- Exhaust gas can be supplied to the air supply fan from the combustion chamber via an adjustable valve disk, namely through a double wall of the mixing tube.
- the invention has for its object to concentrate all the elements necessary for exhaust gas recirculation on the fan burner sitting directly on the combustion chamber closure (combustion chamber door), with the proviso that for completely separate air and exhaust gas routing and delivery along short paths within the burner ensure without the drive effort compared to a conventional forced air burner must be increased.
- the entire exhaust gas supply is limited to a simple opening in the closure of the boiler combustion chamber, while the entire continuation of the intake exhaust gases is concentrated solely on the burner and takes place there completely separately for the combustion air duct.
- No special and separate drive is required for the further impeller, which draws in the exhaust gases, since the drive required for the air supply and the drive required for the impeller is also used for its drive.
- the additional expense for the burner design ultimately only consists in the fact that the air / gas duct housing must be provided with two chambers, i.e. with a partition. This additional effort is minimal, however, since this can be easily mastered by casting technology, especially since, as will be explained in more detail, such a housing can be environmentally friendly without a core, i.e., "shaped green".
- the mixing tube is advantageously and preferably double-walled and the interior of this double wall, which leads to at least one exhaust gas outlet opening, is connected to the exhaust gas chamber.
- all parts of the nozzle assembly advantageously do not come into contact with the exhaust gases.
- the air supply and the exhaust gas routing chambers are, what does not require any further explanation per se and viewed perpendicular to the two impellers and in the direction of the nozzle stock extension, formed from two interconnected spiral or helical spaces, as is customary in burners of this type .
- the forced draft burner consists of a boiler-side open housing 1, which can be placed on the boiler closure 8, in which a mixing tube 10 with a so-called nozzle assembly 4 and a blower impeller 7 for conveying air are arranged on a shaft 5 of the motor 5 'perpendicular to the opening plane of the housing 1', the Fan impeller 7 is assigned an air inflow opening 28 in the adjacent housing wall on the drive side, and the impeller chamber 3 for the combustion air is connected to the interior of the mixing tube 10.
- the housing 1 is divided into an exhaust chamber 2 on the closure plate side and an impeller chamber 3 for the combustion air which extends in parallel therewith by a partition wall 6 penetrated by the nozzle assembly 4 and the shaft 5 is that further in the exhaust chamber 2 on the shaft 5 projecting in this another impeller 7 'for the exhaust gas is arranged, which is assigned an exhaust gas intake opening 9 in the closure plate 8, and that finally the mixing tube 10 is double-walled and the interior 11 of the double wall is connected on the one hand to the exhaust gas chamber 2 and on the other hand is provided with an opening 12 oriented in the direction of the nozzle.
- the entire exhaust gas recirculation is concentrated in the burner or in the housing 1, apart from the exhaust gas suction opening 9 in the closure plate 8, the exhaust gases sucked in by the further impeller 7 'in the shortest possible way and without mixing with the air flowing in through the air inflow opening 28, reaches the mixing tube 10, but not there into the interior in which the nozzle assembly 4 is located, but into the interior 11 of the double wall, which is annular in cross section, from which the pressure standing exhaust gas and recirculated from the combustion chamber emerges as a hose flow from the annular exhaust gas outlet opening 12.
- annular opening a plurality of individual openings can also be provided. The orientation of the openings can be provided transversely to parallel to the longitudinal axis of the mixing tube.
- the impeller chamber 3 of the housing 1 is all associated with the burner and the fan Elements-supporting plate 13 is closed and further on the shaft 5 between the two rotor wheels 7, 7 'a arranged in the partition 6 through opening 14 closing disc 15 is arranged, which is dimensioned larger with respect to the diameter of the impeller 7'. It is advantageous, and as can also be seen from FIG. 1, that at least one magnetic adhesive element 16 is arranged on the edge of the through opening 14 or on the edge of the disk 15.
- This adhesive element 16 can have a ring shape or can also consist of several individual magnets which are arranged in a ring structure.
- an annular seal 15 ' is provided in the contact area of the disk 15 on the partition 6 in order to ensure a gas-tight separation of the two chambers 2, 3.
- a connection of the impeller 7 'to the shaft 5 it is also possible according to the embodiment in Fig. 4, which does not require a disk 15 and provides separate storage of the impeller 7' for exhaust gas recirculation, the impeller 7 'with a more or less elastic Coupling, as shown, to couple with the blower impeller 7.
- the exhaust gas intake opening 9 is arranged directly adjacent to the connecting edge 17 of the closure plate 8 and to the center of the rotor wheel 7 '.
- the exhaust gas opening 23 is thus aligned with the relatively cold, deepest lying area B of the combustion chamber or the combustion chamber, provided the combustion chamber is arranged horizontally with its longitudinal axis (see FIG. 4).
- a shielding orifice 29 can advantageously be provided in front of the suction opening 23, which prevents a direct inflow of the exhaust gases into the suction opening 23 and allows an exhaust gas portion to be drawn in through the adjacent wall of the combustion chamber, which generally also includes Ribs has been cooled intensively.
- the double-walled mixing tube 10 is formed from an inner sleeve 10 'and from an outer sleeve 10'', the outer sleeve having at least one exhaust gas inflow opening 18' on its part 18 projecting into the exhaust chamber 2.
- the double walls of the mixing tube 10 are expediently frustoconical in front of the opening 12 oriented in the nozzle direction and converging in the nozzle direction, as a result of which the exhaust gases supplied are directed into the flame of the burner burning in front of the baffle plate 35.
- the mouth-side end edges 19 of the two sleeves 10 ', 10'' can be configured to be adjustable relative to one another, although this is not particularly shown.
- the inner wall of the exhaust gas chamber 2 is provided with a suitable insulating covering 20, which is not only provided in the area of the impeller 7 ', but also covers the area of the exhaust gas chamber 2 in which the mixing tube 10 extends. 1 and 4, it is also possible to arrange the impeller 7 'in a capsule 21 (for example made of thin stainless steel sheet), which has a suction opening 23 in its closure-side wall 22 and an exhaust gas outlet opening 25 in its peripheral wall 24 is provided.
- the capsule 21 is arranged with a recessed opening edge 26 in the through opening 14 of the partition 6.
- the disc 15 can also be formed from a stainless steel sheet.
- the capsule 21 completely surrounds the impeller 7 ', i.e. the capsule 21 is provided in the drive-side wall 22' with a through-opening 27 encompassing the shaft 5.
- the bearing 30 shown there is suitably sealed against any incoming exhaust gases (not shown), provided that the through opening 27 is not itself provided with a seal.
- this is advantageously designed such that the inner sleeve 10 'of the mixing tube 10 is attached to the dividing wall 6 on the inflow side with a flange 27' from the impeller chamber 3 (see FIG. 3).
- the outer sleeve 10 ′′ of the mixing tube 10 consists, as shown in FIG. 1, of a sleeve part 18 provided with at least one exhaust gas inflow opening 18 ′ and arranged in the exhaust gas chamber 2 and of a front sleeve part 18 ′′.
- the capsule 21 and the sleeve part 18 can advantageously be combined to form a part which is embossed or deep-drawn from a corresponding sheet metal blank made of, for example, thin stainless steel sheet. Since the housing 1 is open to the side of the closure plate 8, there is no difficulty in inserting such a part into the housing.
- the embodiment according to FIG. 5 is therefore intended in particular for forced draft burners which are intended for boilers with greater output.
- This embodiment differs from the above-described exemplary embodiments in that a combustion air inflow space 31 is arranged between the impeller chamber 3 and the exhaust gas chamber 2 of the housing 1, the partition wall part 6 'closing off the exhaust gas chamber 2' being centered on the impeller 7 'in the form of a bearing extending through the inflow space 31 32 and the other partition wall part 6 ′′ delimiting the impeller chamber 3 contains the air inflow opening 28 ′.
- the housing 1, as shown in FIG. 5, is made up of two interconnectable ones Share 1 ', 1 ⁇ formed.
- the combustion inflow space 31 between the two parts 1 ', 1 ⁇ can be oily to the outside, and in the lower region connecting pins 33 on both parts 1', 1 ⁇ are sufficient to be able to produce a firm but detachable connection between the two parts there.
- the shaft 5 ⁇ of the impeller 7 ' is mounted in the long bearing 32 and connected to the short shaft 5 of the motor 5' by a clutch 36.
- the arrangement of the bearing 32 in the combustion supply chamber 31 is associated with the great advantage that this bearing 32 is constantly flushed with the incoming fresh combustion air drawn in by the impeller 7 and is thereby intensively cooled.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Of Fluid Fuel (AREA)
- Air Supply (AREA)
- Incineration Of Waste (AREA)
Claims (12)
- Brûleur à soufflante pour chaudière de chauffage avec retour du gaz brûlé, constitué par un bâti (1) ouvert du côté de la chaudière de chauffage, qui peut être placé sur une plaque de fermeture de la chaudière de chauffage (8), dans lequel un tube mélangeur (10) est placé avec le porte-vent et le rotor de la soufflante (7) sur un arbre (5) du moteur d'entraînement perpendiculaire au plan de l'ouverture du bâti (1), une ouverture d'afflux de l'air (28) dans la paroi voisine du bâti (1) correspondant au rotor de la soufflante (7) pour le refoulement de l'air et le compartiment du rotor (3) étant en relation avec l'intérieur du tube mélangeur (10),
caractérisé en ce
que le bâti (1) est séparé par une paroi de séparation (6) traversée par le porte-vent (4) et l'arbre (5) en formant un compartiment du gaz brûlé (2) du côté de la plaque de fermeture et le compartiment du rotor (3) qui s'étend parallèlement à celui-ci, qu'il est placé un autre rotor (7') dans le compartiment du gaz brûlé (2) sur l'arbre (5) qui y fait saillie ou qu'il est couplé à celui-ci, rotor auquel correspond côté aspiration une ouverture d'aspiration du gaz brûlé (9) dans la porte de fermeture de la chaudière de chauffage (8) et que le compartiment du gaz brûlé est en relation avec l'intérieur du tube mélangeur (10). - Brûleur selon la revendication 1,
caractérisé en ce
que le tube mélangeur (10) est configuré à double paroi et que l'intérieur (11) de la double paroi est en relation d'une part avec le compartiment du gaz brûlé (2) et d'autre part avec au moins une ouverture de sortie du gaz brûlé (12). - Brûleur selon la revendication 1 ou 2, en particulier pour chaudière de chauffage de grande puissance,
caractérisé en ce
qu'un compartiment d'afflux de l'air de combustion (31) est placé entre le compartiment du rotor (3) et le compartiment du gaz brûlé (2) du bâti (1), la partie de la paroi de séparation (6') qui ferme le compartiment du gaz brûlé (2) présentant, de manière centrée par rapport au rotor supplémentaire (7'), un palier (32) qui traverse le compartiment d'afflux (31) et l'autre partie de la paroi de séparation (6''), qui délimite le compartiment du rotor (3), contenant l'ouverture d'afflux de l'air (28'). (Fig. 5). - Brûleur selon la revendication 1 ou 2,
caractérisé en ce
qu'un disque (15), qui ferme une ouverture de pénétration (14) ménagée dans la paroi de séparation (6) qui est de plus grand diamètre que le rotor supplémentaire (7'), est placé sur l'arbre (5) entre les deux rotors (7, 7'). - Brûleur selon la revendication 4,
caractérisé en ce
qu'au moins un élément adhésif magnétique (16) est placé sur le bord de l'ouverture de pénétration (14) ou sur le bord du disque (15). - Brûleur selon l'une des revendications 1 à 5,
caractérisé en ce
que l'ouverture d'aspiration du gaz brûlé (9) est placée en étant directement voisine du bord de raccord (17) de la plaque de fermeture (8) et du centre du rotor supplémentaire (7'). - Brûleur selon l'une des revendications 2 à 6,
caractérisé en ce
que le tube mélangeur à double paroi (10) est formé par une gaine intérieure (10') et une gaine extérieure (10''), la gaine extérieure (10'') présentant au moins une ouverture d'afflux du gaz brûlé (18') sur sa partie (18) qui fait saillie dans le compartiment du gaz brûlé (2). - Brûleur selon l'une des revendications 2 à 7,
caractérisé en ce
que les doubles parois du tube mélangeur (10) sont configurées en étant en forme de cône tronqué devant l'ouverture de sortie du gaz brûlé (12) et en convergent dans le sens de la sortie. - Brûleur selon l'une des revendications 1 à 8,
caractérisé en ce
que le rotor supplémentaire (7') est placé dans une capsule (21) qui est équipée, dans sa paroi du côté de la fermeture (22), d'une ouverture d'aspiration (23) et, dans sa paroi périphérique (24), d'une ouverture de sortie du gaz perdu (25). - Brûleur selon l'une des revendications 7 à 9,
caractérisé en ce
que la gaine intérieure (10') du tube mélangeur (10) est fixée sur la paroi de séparation (6) côté afllux avec un bord recourbé (27) à partir du compartiment de l'air (3). - Brûleur selon la revendication 10,
caractérisé en ce
que la gaine extérieure (10'') du tube mélangeur (10) est formée par une partie de gaine (18) placée dans le compartiment du gaz brûlé (2), qui est équipée d'au moins une ouverture d'afflux du gaz brûlé (18') et par une partie de gaine antérieure (18''). - Brûleur selon la revendication 3,
caractérisé en ce
que le bâti (1) est formé par deux parties (1', 1'') reliées de manière amovible l'une à l'autre, le plan de séparation qui s'étend perpendiculairement à l'axe longitudinal du tube mélangeur s'étendant dans la zone du compartiment d'afflux de l'air de combustion (31).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT9090113114T ATE104756T1 (de) | 1989-08-28 | 1990-07-10 | Geblaesebrenner fuer heizkessel mit abgasrueckfuehrung. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3928384A DE3928384A1 (de) | 1989-08-28 | 1989-08-28 | Geblaesebrenner fuer heizkessel mit abgasrueckfuehrung |
DE3928384 | 1989-08-28 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0415037A2 EP0415037A2 (fr) | 1991-03-06 |
EP0415037A3 EP0415037A3 (en) | 1991-08-14 |
EP0415037B1 true EP0415037B1 (fr) | 1994-04-20 |
Family
ID=6388028
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90113114A Expired - Lifetime EP0415037B1 (fr) | 1989-08-28 | 1990-07-10 | Brûleur à air soufflé pour chaudière de chauffage avec recyclage des fumées |
Country Status (7)
Country | Link |
---|---|
US (1) | US5087194A (fr) |
EP (1) | EP0415037B1 (fr) |
AT (1) | ATE104756T1 (fr) |
CA (1) | CA2023907A1 (fr) |
DD (1) | DD297501A5 (fr) |
DE (2) | DE3928384A1 (fr) |
ES (1) | ES2053024T3 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4118261A1 (de) * | 1991-06-04 | 1992-12-10 | Viessmann Hans | Geblaesebrenner fuer heizkessel |
DE4308731A1 (de) * | 1993-03-19 | 1994-09-22 | Babcock Omnical Gmbh | Verfahren zur Verminderung der Bildung von NOx und Kessel |
US5490774A (en) * | 1994-09-28 | 1996-02-13 | Combustion Engineering, Inc. | Oil gun mounting for use in steam generation boilers |
IES70133B2 (en) * | 1995-12-21 | 1996-10-30 | Heating Research Limited | Conversion oil burner |
FR2760071B1 (fr) * | 1997-02-27 | 1999-05-28 | Pillard Chauffage | Dispositif de montage de bruleurs dans un conduit de gaz a chauffer |
EP1009952A4 (fr) | 1997-05-13 | 2001-05-02 | Maxon Corp | Bruleur industriel a emissions reduites |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2690795A (en) * | 1949-12-05 | 1954-10-05 | Webb Howard William Barrett | Fuel oil burner and controlling apparatus |
DE1551733A1 (de) * | 1962-11-23 | 1970-04-16 | Otto Goldmann | OElvergasungsbrenner |
US3437085A (en) * | 1967-03-01 | 1969-04-08 | American Gas Ass | Self-cleaning gas oven system and gas burner means therefor |
BE795261A (fr) * | 1972-02-10 | 1973-05-29 | Bailey Frank W | Bruleurs canon a retention de flamme bleue et systemes d'echangeur de chaleur |
FR2208504A5 (fr) * | 1972-11-23 | 1974-06-21 | Kabofire Sa | |
DE2365186A1 (de) * | 1973-12-29 | 1975-07-10 | Elco Oelbrennerwerk Ag | Verfahren und vorrichtung zum russfreien verbrennen von fluessigen brennstoffen |
CH609438A5 (fr) * | 1976-02-27 | 1979-02-28 | Fascione Pietro | |
JPS57155010A (en) * | 1981-03-19 | 1982-09-25 | Matsushita Electric Ind Co Ltd | Combustion device |
DE8708656U1 (de) * | 1987-04-21 | 1988-08-18 | Weishaupt, Siegfried, Dipl.-Ing., 7958 Laupheim | Heizkessel |
AT392528B (de) * | 1987-09-21 | 1991-04-25 | Vaillant Gmbh | Einrichtung zur abgasrezirkulation bei einem brennerbeheizten geraet |
DE3820671A1 (de) * | 1988-06-18 | 1989-12-21 | Viessmann Werke Kg | Heizungskessel fuer die verbrennung fluessiger oder gasfoermiger brennstoffe |
-
1989
- 1989-08-28 DE DE3928384A patent/DE3928384A1/de not_active Withdrawn
-
1990
- 1990-07-10 ES ES90113114T patent/ES2053024T3/es not_active Expired - Lifetime
- 1990-07-10 AT AT9090113114T patent/ATE104756T1/de not_active IP Right Cessation
- 1990-07-10 EP EP90113114A patent/EP0415037B1/fr not_active Expired - Lifetime
- 1990-07-10 DE DE59005426T patent/DE59005426D1/de not_active Expired - Fee Related
- 1990-08-22 US US07/571,757 patent/US5087194A/en not_active Expired - Fee Related
- 1990-08-23 CA CA002023907A patent/CA2023907A1/fr not_active Abandoned
- 1990-08-27 DD DD90343661A patent/DD297501A5/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0415037A3 (en) | 1991-08-14 |
EP0415037A2 (fr) | 1991-03-06 |
ATE104756T1 (de) | 1994-05-15 |
DE3928384A1 (de) | 1991-03-21 |
CA2023907A1 (fr) | 1991-03-01 |
ES2053024T3 (es) | 1994-07-16 |
DE59005426D1 (de) | 1994-05-26 |
US5087194A (en) | 1992-02-11 |
DD297501A5 (de) | 1992-01-09 |
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